When you want to schedule a Snapshot and have it accessible in "Read Only" mode please do the following.

Create a Snapshot in Volume Manager and assign it to the Logical Volume
Create a Share for LV0001 for your data located in CONFIGURATION > NAS RESOURCES
Create another Share for your snapshot "Snapbackup" located in CONFIGURATION > NAS RESOURCES
Set your share "Snapbackup" for read only located in CONFIGURATION > NAS RESOURCES
Then set your time values for the Snapshot in MAINTENACE > SNAPSHOT

Note: This will not be a continuous Snapshot for the Logical Volume only for that point in time or until the next scheduled start time.